laravel - 将 Laravel 从 Laravel 5.4 更新到 Laravel 5.5

Question

我正在尝试将 laravel 从 5.4 版本更新到 5.5。我已经按照 Laravel 指南的指示完成了所有操作: https://laravel.com/docs/master/upgrade

当我尝试使用命令时:

composer update

结果是:

Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested package laravel/framework 5.5.* is satisfiable by laravel/framework[5.5.x-dev] but these conflict with your requirements or minimum-stability.

下面我展示了composer.json文件:

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "php": ">=5.6.4",
        "doctrine/dbal": "^2.5",
        "intervention/image": "^2.3",
        "laravel/framework": "5.5.*",
        "laravel/tinker": "~1.0",
        "laravelcollective/html": "^5.4.0",
        "unisharp/laravel-filemanager": "^1.7"
    },
    "require-dev": {
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~6.0"
    },
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "artSite\\": "app/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        }
    },
    "scripts": {
        "post-root-package-install": [
            "php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "php artisan key:generate"
        ],
        "post-install-cmd": [
            "Illuminate\\Foundation\\ComposerScripts::postInstall",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "Illuminate\\Foundation\\ComposerScripts::postUpdate",
            "php artisan optimize"
        ]
    },
    "config": {
        "preferred-install": "dist",
        "sort-packages": true
    }
}

如果您能提供帮助，我将不胜感激。最好的问候

Answer 1

如错误消息中所述，Laravel 5.5 仍处于开发阶段，这意味着没有稳定的版本，并且默认情况下 Composer 限制您只能下载稳定编号的版本，以避免您下载任何正在积极开发且可能包含重大更改的软件包。

您可以通过将以下两行添加到您的 composer.json 文件中来规避此问题

"minimum-stability": "dev",
"prefer-stable": true,

这样，它更喜欢任何可以找到稳定版本的地方，但如果没有其他可用的东西，它将允许您下载dev包。